Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 907a85cb99eb9025…

MALICIOUS

Office (OLE)

142.5 KB Created: 2020-10-15 06:34:00 Authoring application: Microsoft Office Word
MD5: 16223f5eff0c127344aac1e4adc0137e SHA-1: 11d7900c43a3d238286df3b62063bdbaa836dfa2 SHA-256: 907a85cb99eb9025a2842d564fa5a3c47f4183916fa8f4aa5515c6742c1939ad
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an auto-execution attempt. ClamAV identifies the file as Doc.Downloader.Emotet-9778165-0, strongly suggesting the Emotet family. The macro's purpose is to download and execute a second-stage payload, a common Emotet tactic. The embedded URL, though benign according to reputation, is listed as an IOC for completeness.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9778165-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778165-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
aa3822bbb419da819c0009ca2a50458591c2a917d376ecb16e3e87f227973bcb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10774 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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